如何在iOS上的Swift中获取sharedApplication？

Question

如何在Swift中从View Controller获取当前UIApplication的实例？

我收到Use of unresolved identifier 'sharedApplication'此代码的错误:

let app = sharedApplication as UIApplication

Answer 1

编辑Swift 4.x

let app = UIApplication.shared.delegate as! AppDelegate

也许试试:

let app = UIApplication.sharedApplication()

编辑(斯威夫特3):

需要注意的是,在Swift 3中,为了实现这一点,您需要访问该shared属性:

let app = UIApplication.shared

Answer 2

你可以做到

let app =  UIApplication.sharedApplication()